/* styles.css - Дизайн 2026: Черно-белая эстетика с микро-эффектами */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #6b6b6b;
  --border-color: #2a2a2a;
  --accent: #ffffff;
  --accent-hover: #e0e0e0;
  --card-bg: #0f0f0f;
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 400;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
}

/* Типография */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 20px; }
h3 { font-size: 1.5rem; margin-bottom: 16px; }
p { color: var(--text-secondary); margin-bottom: 20px; }

/* Кнопки */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 100px;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  letter-spacing: -0.01em;
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}
.btn-primary:hover {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--text-primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-outline:hover {
  border-color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.02);
}

.btn-large {
  padding: 16px 40px;
  font-size: 1.1rem;
}

/* Бейдж */
.badge {
  display: inline-block;
  padding: 8px 16px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Шапка */
.header {
  position: sticky;
  top: 0;
  background-color: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}
.logo-icon {
  color: var(--text-primary);
  margin-right: 4px;
}

.nav-menu {
  display: flex;
  gap: 40px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
  font-size: 0.95rem;
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  gap: 12px;
}

/* Hero секция */
.hero {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-color);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-title {
  margin-bottom: 24px;
}
.gradient-text {
  color: var(--text-primary);
  text-decoration: underline;
  text-decoration-color: var(--text-muted);
  text-underline-offset: 8px;
}

.hero-description {
  font-size: 1.2rem;
  margin-bottom: 40px;
  max-width: 90%;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  gap: 40px;
}
.stat-item {
  display: flex;
  flex-direction: column;
}
.stat-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}
.stat-text {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.hero-image {
  position: relative;
}
.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 24px;
  filter: grayscale(100%);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.hero-image img:hover {
  filter: grayscale(70%);
}
.image-glow {
  box-shadow: 0 20px 40px rgba(255, 255, 255, 0.02);
}

/* About секция */
.about {
  padding: 100px 0;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 60px;
  align-items: start;
}

.about-text {
  font-size: 1.05rem;
}

.tech-list {
  list-style: none;
  margin: 30px 0;
}
.tech-list li {
  margin-bottom: 12px;
  color: var(--text-secondary);
  padding-left: 24px;
  position: relative;
}
.tech-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--text-primary);
}

.about-image img {
  width: 100%;
  border-radius: 16px;
  filter: grayscale(100%);
  border: 1px solid var(--border-color);
}
.image-caption {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
  text-align: right;
}

/* Features */
.features {
  padding: 100px 0;
  border-bottom: 1px solid var(--border-color);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.feature-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 32px 24px;
  transition: var(--transition);
}
.feature-card:hover {
  background-color: #1a1a1a;
  transform: translateY(-5px);
  border-color: var(--text-muted);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 24px;
  filter: grayscale(100%);
}
.feature-card h3 {
  margin-bottom: 12px;
  font-size: 1.3rem;
}
.feature-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* CTA секция */
.cta {
  padding: 100px 0;
  text-align: center;
  background-color: var(--bg-primary);
}

.cta-content {
  max-width: 800px;
  margin: 0 auto;
}
.cta-content h2 {
  margin-bottom: 20px;
}
.cta-content p {
  margin-bottom: 40px;
  font-size: 1.2rem;
}

.cta-image-wrapper {
  max-width: 600px;
  margin: 40px auto;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}
.cta-image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  filter: grayscale(100%);
  transition: var(--transition);
}
.cta-image-wrapper img:hover {
  transform: scale(1.02);
  filter: grayscale(80%);
}

.small-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 20px;
}

/* Футер */
.footer {
  background-color: var(--bg-secondary);
  padding: 80px 0 40px;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
}

.footer-col .logo {
  margin-bottom: 20px;
}
.footer-col p {
  font-size: 0.9rem;
  color: var(--text-muted);
}
.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 24px;
  color: var(--text-primary);
}
.footer-col ul {
  list-style: none;
}
.footer-col ul li {
  margin-bottom: 12px;
}
.footer-col ul li a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-col ul li a:hover {
  color: var(--text-primary);
}

/* Адаптивность */
@media (max-width: 1024px) {
  .hero-grid, .about-grid {
      grid-template-columns: 1fr;
  }
  .features-grid {
      grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
      grid-template-columns: repeat(2, 1fr);
  }
  .nav-menu {
      display: none; /* Для простоты, в реальном проекте добавить бургер */
  }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; }
}
/* Стили для нового блока FAQ */
.faq {
  padding: 100px 0;
  background-color: var(--bg-primary); /* Можно сделать фон как у основной секции */
  border-bottom: 1px solid var(--border-color);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-bottom: 50px;
}

.faq-item {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 30px;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--text-muted);
  background-color: #151515;
}

.faq-question h3 {
  font-size: 1.2rem;
  margin-bottom: 15px;
  color: var(--text-primary);
  position: relative;
  padding-left: 0;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

.faq-more {
  text-align: center;
  margin-top: 20px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}

.faq-more p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.faq-more a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid var(--text-muted);
  padding-bottom: 2px;
}

.faq-more a:hover {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}

/* Адаптивность для FAQ */
@media (max-width: 768px) {
  .faq-grid {
      grid-template-columns: 1fr;
  }
}